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Copper-cobalt bimetal/porous carbon nanofiber composite material, and preparation method and application thereof

A nanofiber and composite material technology is applied in the field of preparation of copper-cobalt bimetallic/porous carbon nanofiber composite materials, which can solve the problems of low specific surface area of ​​composite catalysts, insufficient utilization of active sites, and poor compound adsorption capacity. To achieve good acid and alkali resistance catalytic effect, improve the ability to degrade organic pollutants, and promote the effect of adsorption

Active Publication Date: 2018-11-13
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to further improve the catalytic performance, some studies have conducted electrospinning and carbonization of polymer solutions containing copper salts and iron salts to prepare copper-iron bimetallic / carbon nanofiber catalysts; however, the specific surface area of ​​the obtained composite catalysts is not high, and large Part of the active center is wrapped inside the carbon fiber, resulting in insufficient utilization of the active site, which affects the catalytic effect; and the resulting catalyst usually has a mesoporous structure, which has poor adsorption capacity for low molecular weight compounds, which further affects its catalytic effect

Method used

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  • Copper-cobalt bimetal/porous carbon nanofiber composite material, and preparation method and application thereof
  • Copper-cobalt bimetal/porous carbon nanofiber composite material, and preparation method and application thereof
  • Copper-cobalt bimetal/porous carbon nanofiber composite material, and preparation method and application thereof

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Embodiment 1

[0039] A kind of copper-cobalt double metal / porous carbon nanofiber composite material, its preparation method comprises the steps:

[0040] 1) Add 6mmol of copper acetate, 2mmol of cobalt acetate, 1g of biomass tar and 2g of polyacrylonitrile into 18g of N,N-dimethylformamide (DMF) solution, and stir evenly to obtain the electrospinning precursor solution;

[0041] 2) Place the electrospinning precursor solution obtained in step 1) in a 10ml syringe with a needle, the voltage is 20kV DC high voltage, and the distance between the needle and the receiving plate is 15cm; the flow rate of the precursor solution is controlled by a syringe pump The humidity is 1.0ml / h; the humidity of the environment during the electrospinning process is 30-50%; copper acetate / cobalt acetate / biomass tar / polyacrylonitrile composite nanofibers are obtained by electrospinning;

[0042] 3) Put the composite nanofibers obtained in step 2) into a tube furnace, firstly preheat and oxidize at 240°C in air...

Embodiment 2

[0056] 1) Add 2mmol of copper acetate, 6mmol of cobalt acetate, 0.5g of biomass tar and 2g of polyacrylonitrile into 13.4g of N,N-dimethylformamide (DMF) solution, stir evenly, and obtain electrospun Precursor solution;

[0057] 2) Place the electrospinning precursor solution obtained in step 1) in a 10ml syringe with a needle, the voltage is 20kV DC high voltage, and the distance between the needle and the receiving plate is 15cm; the flow rate of the precursor solution is controlled by a syringe pump The humidity is 1.0ml / h; the humidity of the environment during the electrospinning process is 30-50%; copper acetate / cobalt acetate / biomass tar / polyacrylonitrile composite nanofibers are obtained by electrospinning;

[0058] 3) Put the composite nanofibers obtained in step 2) into a tube furnace, firstly preheat and oxidize at 240°C in air for 3h (heating rate is 1°C / min); then use nitrogen as a protective gas and carbonize at 800°C for 2h (The heating rate is 5°C / min); finall...

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Abstract

The invention discloses a preparation method of a copper-cobalt bimetal / porous carbon nanofiber composite material. The preparation method comprises the following steps: first, preparing copper salt / cobalt salt / biomass tar / polymer-containing composite nanofiber by electrospinning; then, carbonizing the composite nanofiber at a high temperature to prepare a copper-cobalt bimetallic / porous carbon nanofiber composite material; and finally, degrading azo dyes in sewage in the presence of the material. The material not only has a good catalytic effect on acid red 1 (anionic azo dye) and methylene blue (cationic azo dye), but also has a good catalytic effect on a mixed solution of acid red 1 (anionic azo dye) and methylene blue (cation azo dye). The material can catalytically degrade azo dyes under normal temperature and pressure, and has the advantages of simple preparation process, low process cost, less catalyst dosage, high reaction rate, high decolorization rate, convenient recovery andthe like, and can be used for rapid degradation of the azo dyes in industrial wastewater.

Description

technical field [0001] The invention belongs to the technical field of environmental functional materials, and in particular relates to a preparation method and application of a copper-cobalt bimetallic / porous carbon nanofiber composite material. Background technique [0002] The pollution of global water resources is becoming more and more serious, which has become the focus of the majority of citizens. Therefore need to invent a kind of catalyst that can degrade the organic pollutant in water rapidly. Nanoparticle catalysts have the characteristics of small particle size and large specific surface area, which can increase the contact area with organic pollutants and enhance the catalytic effect. However, due to its small particle size, large surface energy, and easy agglomeration, the active sites are reduced during the catalytic process. Therefore, it is necessary to further introduce substrates such as zeolite and clay to fix the nanoparticles to improve the catalytic e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75B01J35/10B01J37/00C02F1/00C02F101/34C02F101/36C02F101/38
CPCC02F1/00B01J23/75B01J37/0018C02F2101/38C02F2101/40C02F2101/36C02F2101/34B01J35/633B01J35/615
Inventor 蔡宁陈梅喻发全冯小娟刘明明王建芝
Owner WUHAN INSTITUTE OF TECHNOLOGY
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